Amasi
A traditional Zimbabwean fermented milk with the body of a thick curd. Milk is left to ferment at ambient temperature until naturally present lactic acid bacteria multiply, produce acid and coagulate the casein into a tangy, spoonable mass. A portion of naturally fermented cream is sometimes stirred in to enrich it and improve viscosity. Amasi is commonly eaten with sadza, the stiff maize porridge that anchors many meals, supplying protein alongside the staple carbohydrate. Like other spontaneously fermented milks, it shows how controlled souring preserves a perishable raw material without refrigeration: the falling pH suppresses most pathogens and spoilage organisms while developing flavour.